Constant pressure sprinkler



b' 1945 0? H. ENGLEHART 2,330,101

CONSTANT PRESSURE SPRINKLER Filed Oct. 25, 1943 INVENTOR.

a a/era x /c vaz 5 7/9097.

27 i WW Patented July 10, 1945 TED STATE-S PATENT OFFICE 2,380,101

CONSTANT PRESSURE SPRINKLER Orton H. Englchart, Glendora, Calif. Application October 25, 1943, Serial No. 507,501

3 Claims. -(c1. 299-69) My invention relaitesto a constant pressure sprinkler and the subject matter herein shown described and claimed, is'a continuation-in-part of my co-pending application for patent on Self regulating sprinkler, filed July 31, 1940, SenNo.

The principal object of my present invention is, to provide a. constant pressure sprinkler and which rotates with a" step by step movement as a. result of repeated impacts of a spring actuated pivoted element, with simple and effective means" forbringing about and maintaining a stable step by stepiorward rotation of the jet nozzle and associated parts, regardless of the elevation of the rotating jet nozzle in relation to the part upon'whi'ch it isvmounte'd.

With the foregoing and other objects in view, my invention consists in certain novel features of construction and arrangement of partswhich will be hereinafter more fully described and claimed and illustrated in'the accompanying drawing, in which: I

Fig. 1 is a vertical section taken through the center of my improved sprinkler.

Fig. 2 is a horizontal section taken on the line 2-2 of Fig. 1.

Fig. 3 is a horizontal section taken on the line 3--3 of Fig. 1.

Fig. 4 is a horizontal section taken on the line '4-4 of Fig. 1. l

Fig. 5 is a horizontal section taken on the line 55 of Fig. 1.

Fig. 6 is a horizontal section taken on the line 6-6 of Fig. 1.

Referring by numerals to the accompanying,

drawing, which illustrates a preferred m 0d ment of my invention, 10 designates the sprinkler head carried by the upper end of a'tubular spindle I l which is mounted to rotate and slide vertically through the upper portion of a tubular member l2 and the latter being mounted on an upright water supply pip [3.

The upper portion of member 12 provides a bearing l2 for spindle II and formed in the lower portion of said member I2 is a chamber l4 within which is fixed, a concentrically arranged tube IS, the upper portion of which provides a bearing for the lower portion of spindle ll.

Formed through the wall of tubular spindle I l are apertures l6, which, when the sprinkler is at rest, occupy positions just below th lower end of the bearing l2 as illustrated in Fig. 1 and thus the duct through the tubular spindle is in communication with chamber l4 in'member I 2.

Seated inthe center of the closed lower end of spindle I] is a screw ll and formed through said closed lower end around said screw are ports [8.

Swiveled upon the lower end of screw H is a cup washerlQ and secured thereto is the upper end of a retractile spring 2-0, which is suitably connected to the upper end'of screw 2| and the This vane is preferably a compound vane or a combination of a vane and spoon as illustrated and described in detailin U. S. Letters Patent #l,997,901 issued to me April 116, 1935.

As arm 2-6 oscillates on "its iaxis,'th'eside of vane 21 intermittently strikes against a lug '24 which projects outwardly trom the side of nozzle 24 thereby moving same :a short distance, and when in contact with said nozzle said vane is in the path of travel of the jet issuing from said nozzle as illustrated in Fig. 2.

Detachably secured to the upper end of pin 25 is a washer 28 to which is secured the upper end of a torsional spring 29, the lower end thereof being connected to arm 26, so as to yieldingly resist'the outward swinging movement of the forward, vane-carryin end of said arm.

The rear end of arm 26 carries a weight 30 which counterbalances the weight of vane 21.

In order to produce and maintain a stable step by step movement for the sprinkler head, I provide frictional means between said head and the upper portion l2 of member I2, such means including an open resilient ring 3|, which is sprung onto the upper end of. portion l2 so as to engage same with a certain degree of friction and one end of this spring projects outwardly to form a finger 32.

Secured to head In is the upper end of a plate 33, the depending bifurcated lower portion 34 of which receives finger 32, and thus operative engagement between the parts is'provided regardless of the elevated position of the sprinkler head. (See Fig. 3'.)

In order to minimize leakage through the joint between tubular spindle II and its bearing [2, said'spindle within said bearing may be provided with an annular groove 35 having communication with the .duct through tubular spindle and the chamber M in member I2 and which arrangement is more fully set forth in my aforesaid co-pending application Ser. No. 348,672.

In the operation of my improved constant pressure sprinkler, spindle II, head III and part carried thereby are elevated b pressure of the water entering chamber I4 from. supply pipe I3 and as such movement occurs, the openings I6 enter the bearing in part I2 thereby gradually restricting water fiow through said openings until the pressure in the chamber within tube I below spindlel I exerts an upward thrust on said spindle,

to equal the weight of the sprinkler head unit, plus the pull of spring 20, which opposes upward movement of the spindle.

The tension of spring 20 may be adjusted by means of screw 2I so as to establish a balance or equilibrium point at the desired pressure.

Ports I8 permit pressure to pass from the duct in spindle ll intothe chamber in member I5 below said spindle. The jet of water issuing from nozzle 24 impinges against vane 21 thereby swinging same outwardly a'short distance and as said vane swings inwardly under the influence of spring 29, it strikes against lug 24- on the side of the nozzle thereby causing head ID to rotate a short distance in its bearing [2 'Thus, as the movements just described are repeated, the sprinkler head and nozzle are rotated with an intermittent or step by step movement. Such movement is controlled and rendered stable by the-frictional engagement of spring 3| with member I2 and theprovision of the bifurcated arm 33 and'finger 32 received thereby, enables the frictional means to function regardless of the elevation'of the tubular spindle and parts carried thereby. t

Where the sprinkler is constructed to move clockwise, spring 3| is arranged on bearing I2 so that, as the sprinkler moves backward under the torsional stress of the outwardly swinging arm 26, it is checked by the tightening of spring around said bearing and upon reverse or clockwise movement of the arm and sprinkler the pring is loosened upon its bearing, thereby permitting relatively free rotation of the head In and parts carried thereby.

Thus it will be seen that I have provided a constant pressure sprinkler which is simple in structure, inexpensive of manufacture and very effective in performing the functions for which it is intended.

It will be understood that minor changes in the size, form and construction of the various parts of my improved constant pressure sprinkler maybe made and substituted for those herein shown and described without departing from the spirit of the invention, the scope of which is set forth in the appended claims.

I claim as my invention:

1. In a constant pressure water sprinkler, a tubular spindle, a sprinkler head mounted on said tubular spindle, means mounted on said sprinkler head and actuated by the water discharging from said head for imparting step by step rotary movement to said head and spindle, a support in which said spindle is mounted for rotary movement. said support having a chamber, there being an opening formed in said spindle and adapted to communicate with the opening in said support, the effective size of which opening is restricted as the spindle moves upwardly through said support with means for yieldingly resisting the upward movement of said spindle.

2. A constant pressure water sprinkler as set forth in claim 1 and means for adjusting said yielding resistance means.

3. In a constant pressure water sprinkler, a hollow support having a bearing, means for delivering water under pressure to said support, a tub'ular spindle mounted for rotation in said bearing, a sprinkler head mounted on said tubular spindle, swinging means actuated by the water discharging from said head for imparting step by step rotary movement to said head and spindle and cooperating means between said support and said spindle for yieldingl resisting the movement of said swinging means in one direction and for permitting free movement of said swinging means in the opposite direction. 

